Which one of the following statements is true ?

Options

A. The collenchyma occurs in layers below the epidermis in monocotyledonous plants
B. Sclerenchyma cells are usually dead and without protoplasts
C. Xylem parenchyma cells are living and thin-walled and their cell walls are made up of lignin
D. The companion cells are specialised sclerenchymatous cells

Answer

B

Explanation

Sclerenchyma are considered thick-walled lignified supportive tissue characterised by the absence of living protoplast. Their principal function is to provide mechanical support.